Condensed heterocyclic derivatives and herbicides

Abstract

A condensed heterocyclic derivative of the formula ##STR1## (wherein R is a hydroxyl group, R.sup.3 or R.sup.4 is an alkoxy group, W is an oxygen atom, Yn is a hydrogen atom, Z is a methine group, and A is a 5- or 6-membered heterocyclic ring which may be substituted, and a herbicide, are presented. When used for paddy field treatment, upland soil treatment and foliage treatment, the condensed heterocyclic derivative of the present invention exhibits excellent herbicidal activities against gramineous and non-gramineous weeds without adversely affecting crop plants.

Claims

3. A triazine derivative or a salt thereof according to claim 1, wherein A in the formula (I) is (A-1), (A-2), (A-3) or (A-4), W is an oxygen atom or a sulfur atom, and each of R.sup.3 and R.sup.4 is an alkoxy group.

4. An herbicidal composition containing an herbicidally effective amount of the triazine of claim 1 and a carrier therefor.

5. An herbicidal composition containing an herbicidally effective amount of the triazine of claim 2 and a carrier therefor.

6. An herbicidal composition containing an herbicidally effective amount of the triazine of claim 3 and a carrier therefor.